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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (6.7L Diesel - DTCS P0402 To P1CEF - 2500 & 3500) >> Diagnosis and Testing >> P0633-Skim Secret Key Not Stored In Pcm >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
SKIM NOT CALIBRATED PROPERLY

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE - 6.7L  . 

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